Hi,

I dont know why you need to execute 3 SQLs parallelly. But you can try something like this.

use threads;
use DBI;

my $dbh = DBI->connect( <your connection string> );

$SQL_1 = "SELECT * FROM x";
$SQL_2 = "SELECT * FROM y";
$SQL_3 = "SELECT * FROM z";

sub start_thread {
    my ($dbh,$SQL) = @_;
    
    # print('Thread started: ', SQL, "\n");

    my $sth = $dbh->prepare($SQL);
    $sth->execute();

    < Add your code here >

}

 my $thr1 = threads->create('start_thread', $dbh, $SQL_1);
 my $thr2 = threads->create('start_thread', $dbh, $SQL_2);
 my $thr3 = threads->create('start_thread', $dbh, $SQL_3); 

$thr1->join();
$thr2->join();
$thr3->join();
[download]

For more details, refer to threads

Notes:

1. This is NOT a fully functional working code. it just gives a brief idea about how to do.
2. Make sure that 3 SQLs running together wont make any inconsistance. See the example where I am selecting from 3 different tables, which are almost independant and it wont make any inconsistancy or locks. (I cant say that too 100% secure )
3. Whenvever possible Donot use parallel SQLs

Cheers !

--VC

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There are three sides to any argument.....
your side, my side and the right side.

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In reply to Re: mutiple threading by atemon
in thread mutiple threading by perlCrazy

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